In Essex, England 250 people put on wetsuits, swam across an icy river and then crawled through a huge heap of mud for the annual Maldon Mud Race. The tradition began over 30 years ago after a pub manager promised a free drink to anyone who could cross the muddy water — and get back again. Now people do it for charity, ploughing through the mud in all sorts of wacky outfits. The race can be pretty heavy going. After trudging through the mud the crawlers had to get clean in a freezing shower. But it was all worth it, because the whole thing raised over £20,000 for charity.